My current house has a tragic recent past. A family of 4 lived there: mother, father, a little boy and a little girl.
One day, the little boy was out riding his bike. He darted into the street, about a half block away, and was struck and killed.
The father used the settlement/insurance money to make many of the "upgrades" to the house. (sliding doors in the DR to a new deck, vinyl siding, vinyl windows, etc.) He did this work because he grew up in the house, and had no plans of moving. But, his little girl was too traumatized by staying. So, they put the house on the market, (that's when I bought it) and built a new house in a different neighborhood.
Generally, this doesn't bother me, except when I stumble upon evidence of the little boy. For example, there are 2 sets of children's handprints in the newer concrete driveway. And, there are lines indicating a child's height in the closet of the little boy's former room. I'm not freaked out by these things, but they do make me sad.
If you're wondering how I know so much about what happened, the PO father stopped by to visit a couple days after I started moving in, and told me the whole story.